HULL KR have opened up a nine-point lead over second-placed Wigan Warriors in the Frontline Fair Play Index.
Crusaders RL suffered the biggest fall this week, moving from second to fifth place after conceding 14 points in their 46-12 defeat against Warrington Wolves.
Catalans Dragons remain at the foot of the table but there are now just five points separating the bottom three sides, which include Huddersfield Giants and Harlequins RL.
At the end of the regular season the teams which finish top of the Frontline Fair Play Index in the Engage Super League and Co-operative Championship will be presented with a £5,000 prize from leading bathroom suppliers Frontline Bathrooms as well as a specially engraved trophy to mark their achievement.